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Abstract

A high-power light pulse generating apparatus in which an optical fiber doped with a rare earth element is used in an optical system for facilitating control and and adjustment of the apparatus. The light output power and the pulse width thereof can be varied simply by changing the characteristics and the length of the optical fiber. In the high-power light pulse generating apparatus, an output of an optical pumping light source (2) is inputted to an optical coupler (3) which constitutes an optical loop in cooperation with the optical fiber (1) doped with a rare earth element, an optical decoupler(4), an optical switch (5A), an isolator (7) and an input port of the optical coupler (3). By turning on the optical switch (5A), a high-power light pulse can be generated through the optical loop and extracted from an output port of the optical decoupler (4).

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